Article
Nanoscience & Nanotechnology
Shan Du, Tiantian He, Guang Yang, Huali Nie
Summary: This study presents a new strategy for surface coating of wigs using a nanocomposite of hair-derived keratin and graphene oxide via the LB technique. Compared to the conventional immersion method, this strategy achieves higher surface coverage and a close-packed structure, resulting in improved performance and durability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Chenglong Cai, Ting Wang, Yixin Zhang, Nongyue He
Summary: The macroscopic ensembles of graphene are important for applications such as electromagnetic-interference shielding, thermal control, and sensors. A one-step strategy was developed to produce ultra-large neat graphene oxide film with excellent thermal conduction and photothermal conversion properties. By modifying the substrate with different concentrations of APTEs, defects in the UN-GO film structure were avoided, leading to improved thermal conductivities.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Chenfang Sun, Rui Li, Yaru Song, Xiaoqian Jiang, Congcong Zhang, Shanshan Cheng, Wenping Hu
Summary: A novel organic material, BFPA, has been developed for OFET-based biosensors, enabling ultrasensitive determination of AFP in human serum and differentiation between liver cancer patients and healthy individuals.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
A. Maine, M. Encinas, J. Pavez, M. Urzua, G. Gunther, I Reyes, X. Briones
Summary: The photo-polymerization of stearyl methacrylate directly at the air-water interface was studied by measuring the pressure-area isotherm at different irradiation times. The polymerization resulted in a film with a compressed liquid phase and a higher order due to stronger packing forces. The film exhibited a solid phase-like behavior even before collapse. A solvent-free procedure to obtain a photo-polymeric film at the air-water interface was presented.
Article
Materials Science, Multidisciplinary
Kashan Burhan Mohamed, Somayeh Ghaderi, Rahman Hallaj, Abdollah Hassanzadeh
Summary: Two-dimensional large scale LB films of magnetic nanowires (MNWs) were prepared on glass substrates for the first time using the Langmuir-Blodgett (LB) technique. The MNWs were synthesized by template directed electrodeposition method. The successful transformation of MNWs onto the substrates demonstrated the effective assembly of MNWs using the LB technique. These results open up new opportunities for the applications of magnetic nanomaterials in physical and chemical sensors, data-storage media and magnetic switching devices.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Analytical
Ilya Gorbachev, Andrey Smirnov, George R. R. Ivanov, Tony Venelinov, Anna Amova, Elizaveta Datsuk, Vladimir Anisimkin, Iren Kuznetsova, Vladimir Kolesov
Summary: A sensitive coating based on Langmuir-Blodgett (LB) films containing monolayers of DPPE with immobilized GOx enzyme was created. The effect of immobilization of GOx enzyme molecules on the surface properties of a Langmuir DPPE monolayer was investigated. The sensory properties of the resulting LB DPPE film with immobilized GOx enzyme in glucose solutions of various concentrations were studied. The findings suggest that acoustic methods can be used to determine the concentration of glucose molecules in an aqueous solution, and the developed technology has potential applications in the food and pharmaceutical industries.
Article
Chemistry, Multidisciplinary
Lennart Graewe, Maximilian L. L. Hupfer, Martin Schulz, Atif Mahammed, Zeev Gross, Martin Presselt
Summary: Amphiphilic iron(III) corroles are assembled into well-defined quasi-two-dimensional molecular monolayers at air-water interfaces using the Langmuir-Blodgett (LB) technique. The optical density of the stacks of molecular monolayers allows for photometric detection of nitric oxide (NO) binding. The highest molecular efficiency for NO binding and detection is achieved at the smallest packing densities.
Article
Chemistry, Multidisciplinary
Kazuaki Tachimoto, Takashi Ohata, Kanokwan Jumtee Takeno, Akihiro Nomoto, Takeshi Watanabe, Ichiro Hirosawa, Rie Makiura
Summary: Metal-organic frameworks (MOFs) have unique characteristics that make them ideal for applications in various scientific areas. To fully utilize their features, it is important to fabricate and integrate thin films of MOFs, especially downsized MOFs into nanosheets, which can act as functional components in nanodevices. This study demonstrates how changing the concentration of a ligand spread solution can modify the assembly of MOF nanosheets at the air/liquid interface, providing insights for the control of MOF nanosheet features.
Article
Chemistry, Multidisciplinary
Vengadesh Periasamy, Muhammad Musoddiq Jaafar, Karthikeyan Chandrasekaran, Sara Talebi, Fong Lee Ng, Siew Moi Phang, Georgepeter Gnana Kumar, Mitsumasa Iwamoto
Summary: The prevalence of photosynthesis and its potential as a renewable energy source has led to the development of solid-state semiconductive devices like photovoltaic solar cells. However, direct utilization of plant-based biophotovoltaics (BPV) has been impracticable. In recent years, fuel cells (FCs) relying on redox potentials of algae suspensions or biofilms have shown promise as clean power generators. These algal BPVs offer advantages such as carbon sequestration and biomass harvesting. Development of high-performance BPVs is reliant on upgraded anode materials with dynamically nanostructured surfaces, but challenges in optimizing these materials hinder commercial viability. Graphene-based carbonaceous materials have been explored for FCs due to their flexible surface functionalization properties, but disorders on the molecular scale restrict efficient charge coupling. Langmuir-Blodgett (LB) film has shown potential in addressing these limitations, but its application in BPVs remains untapped. A comprehensive understanding of LB film fabrication and electron transfer mechanisms is crucial for the scalability of BPVs.
Article
Polymer Science
Thiers M. Uehara, Fernanda L. Migliorini, Murilo H. M. Facure, Nicolau B. Palma Filho, Paulo B. Miranda, Valtencir Zucolotto, Daniel S. Correa
Summary: The study investigates the application of graphene oxide (GO) in medical devices, focusing on its interactions with liver cancer cells on different scaffold platforms. Spectroscopic and electrochemical analysis reveal the characteristics of GO-cell interactions, providing insights for regenerative medicine research.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Boryeong Lee, Minchul Sung, Kyounghee Shin, Jin Hyun Lee, Jin Woong Kim
Summary: This study examines the effects of ceramides with ultra-long chain and ceramides with three chains on the microphase transition of lipid assemblies. It is found that ceramides with ultra-long chain promote lateral lipid packing, while ceramides with three chains hinder lateral lipid packing. The addition of surfactants disrupts lipid packing and reduces the elasticity of lipid assemblies.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Fabio A. Scholl, Danilo A. Oliveira, Jose R. Siqueira Siqueira Jr, Luciano Caseli
Summary: Investigating the best combination of graphene oxide, phospholipids, and their physicochemical parameters can lead to the development of (bio)supercapacitor devices. In this study, Langmuir-Blodgett films were fabricated with a nanostructured complex of graphene oxide, manganese dioxide, and dimyristoyl-phosphatidic acid. These films exhibited the properties of a supercapacitor, with capacitances of 30 mu F/cm2 and charge-discharge cycles of 185 s.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Biochemistry & Molecular Biology
Koichiro Ishida, Tetsuo Kondo
Summary: The alignment of anisotropic nanomaterials affects their functions. Rod-like cellulose nanocrystals (CNCs) form liquid crystals with self-ordering and exhibit unique optical properties. Native cellulose nanofibrils (CNFs) are oriented and their orientation correlates with their mechanical strength and cell responses. A fabrication method for non-uniaxial, fingerprint-like alignment of CNFs using the Langmuir-Blodgett technique is proposed. The obtained Langmuir-Blodgett films of CNFs show anisotropic frictional properties depending on the orientation direction. This process for CNF ultrathin film fabrication can be used for novel surface design with desired structure-function correlations, providing anisotropic surface properties.
Article
Polymer Science
Yongliang Tu, Gangyao Wen, Dimitrios Selianitis, Stergios Pispas
Summary: The influences of subphase pH and temperature on the interfacial aggregation behavior of double hydrophilic hyperbranched copolymers have been studied. A dense network structure composed of circular micelles with carbon backbone cores and mixed shells of OEGMA and DIPAEMA pendant groups has been identified.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Weijie Wang, Xian Xu, Fengfeng Feng, Yu Shao, Hanxin Jian, Hao Liu, Xue-Hui Dong, Aimin Ge, Shuguang Yang
Summary: In this study, the interfacial behaviors of giant amphiphilic molecules with different number of hydrophobic BPOSS blocks were investigated. The number of BPOSS blocks and compression rate were found to significantly influence the interfacial behaviors. The study provides insights into the static elasticity, stability, and reversibility of Langmuir films.
Article
Materials Science, Ceramics
Pavan K. Narayanam, K. Sundararajan
CERAMICS INTERNATIONAL
(2020)
Article
Engineering, Electrical & Electronic
M. Monish, Shyam Mohan, D. S. Sutar, S. S. Major
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2020)
Article
Spectroscopy
D. S. Sutar, Nirvikar Kushwaha, Shravan K. Appani, S. S. Major
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
(2020)
Article
Materials Science, Multidisciplinary
Shravan K. Appani, Ashok Kumar Yadav, D. S. Sutar, S. N. Jha, D. Bhattacharyya, S. S. Major
Article
Chemistry, Physical
Pavan K. Narayanam, S. S. Major
Summary: The GO-TiO2 nanocomposite sheets were transferred onto solid substrates using Langmuir-Blodgett method and subjected to heat treatment to obtain rGO-wrapped TiO2 nanostructures. The heat treatment conditions significantly influenced the reduction of GO, crystalline phases of TiO2, and the development of composite nanostructures. Photocatalytic studies showed strong dependence of photo-degradation on the morphology of the nanocomposite sheets.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Electrical & Electronic
Praloy Mondal, Shravan K. Appani, D. S. Sutar, S. S. Major
Summary: A systematic study on Ga-doped ZnO films deposited by radio frequency reactive magnetron co-sputtering of Zn and GaAs has been conducted to realize n-GZO/p-Si heterojunction diodes. It has been found that the doping level and conductivity of the GZO layer can be controlled by the partial pressure of oxygen in the sputtering atmosphere, leading to the fabrication of diodes with improved performance. The presence of nearly complete c-axis orientation, absence of oxygen vacancies, and chemisorbed oxygen at the grain boundaries in the GZO layer appear to enhance the diode performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Physics, Applied
M. Monish, S. S. Major
Summary: This study investigated the properties of epitaxial GaN films grown at different nitrogen partial pressures, revealing parameters such as lattice strain and dislocation density through various testing methods. The research found that the strain and stress of the films mainly depend on the nitrogen partial pressure and the ratio of nitrogen to argon content.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Environmental
Pavan K. Narayanam, S. Sriram, K. Sundararajan
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Engineering, Electrical & Electronic
Mohammad Monish, C. Nayak, D. S. Sutar, S. N. Jha, D. Bhattacharyya, S. S. Major
Summary: Undoped GaN films were epitaxially grown on c-sapphire by rf magnetron reactive sputtering of GaAs at different N-2 percentages in Ar-N-2 sputtering atmosphere. The conductivity of the films increased with a decrease of N-2 percentage, accompanied by changes in N/Ga ratio and the presence of different types of vacancies in the films. The study also identified the main sources of n-type conductivity in sputtered GaN films and the factors affecting the conductivity levels.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Rini K. Vishwakarma, Pavan K. Narayanam, R. Umamaheswari, K. Sundararajan
Summary: The interaction between graphene oxide and strontium ions is highly sensitive to various factors such as the size and aging of GO sheets, pH of the environment, and functional groups. Membranes made from fresh and large GO sheets demonstrate superior strontium adsorption capacity, but efficiency decreases with aging of GO sheets and increase in mass on the membrane. The membrane-based filtration procedure introduced in this study provides a lamellar structure of GO sheets with abundant surface area for efficient strontium adsorption.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Electrical & Electronic
Mohammad Monish, S. S. Major
Summary: Si-doped GaN films were grown on c-sapphire substrate by rf magnetron reactive co-sputtering under different N2 percentages. The Si content, N/Ga ratio, lattice parameters, and the density, stress, and strain of defects in the films were found to be significantly influenced by the N2 percentage.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Pavan K. Narayanam, Rini K. Vishwakarma, S. R. Polaki
Summary: Free standing graphene oxide membranes (FSGOMs) with excellent adsorption ability were prepared by controlled infra-red irradiation of aqueous GO dispersions, and they have potential applications in wastewater purification.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Rini K. Vishwakarma, Pavan K. Narayanam, Pabitra Ghosh
Summary: The preparation and evaluation of GO-CE composites for strontium separation were conducted, highlighting the superiority of GO-18C6 composites. The interaction mechanism between 18C6 molecules and GO layers was investigated, and optimal adsorption conditions were determined. The composite membranes exhibited high adsorption capacity for Sr(II) and showed potential in the removal of alkali/alkaline earth metal ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Proceedings Paper
Physics, Condensed Matter
M. Monish, Shyam Mohan, D. S. Sutar, S. S. Major
DAE SOLID STATE PHYSICS SYMPOSIUM 2019
(2020)
